I fly FW and RW and as much as I prefer to fly RW , which will always be my first love , there's no comparison. So much more can go wrong, so much quicker in RW. The nature of off airport landings, critical components and the nature of rotational stresses all add up to making RW machines an indulgence that is far more likely to to separate one's head from one's neck when things go pear shaped.
As for which is more fun, more challenging to fly ..RW wins hands down in my humble opinion